نتایج جستجو برای: frequency domain analysis

تعداد نتایج: 3476979  

2003
Zhong Ji Shuren Qi

In the clinical analysis and processing for EEG, because of the difference of ages and pathology, it is possible to appear abnormal waves related with pathology. Also, the restrain of normal rhythms could be abnormal. But at present doctors estimate if certain rhythm is restrained only by using the method of eyeballing or by some simply analysis methods in clinical EEG detection, which will ine...

Journal: :رادار 0
مجدالدین اسفندیاری مهرزاد بیغش عباس شیخی

pulse trains deinterleaving is one of the most important tasks in es systems. in this field, fast separation and having ability to detect various types of pri is critical. in this article, a new fft-based method is proposed to deinterleave radar pulse trains. the main advantage of the proposed method compared to the previous ones is its lower computational complexity and also having less probab...

The output data from a structure is the building block for output-only modal analysis. The structure response in the output data, however, is usually contaminated with noise. Naturally, the success of output-only methods in determining the modal parameters of a structure depends on noise level. In this paper, the possibility and accuracy of identifying the modal parameters of a simply supported...

The extension of classical analysis to time series data is the basic problem faced in many fields, such as engineering, economic and medicine. The main objective of discriminant time series analysis is to examine how far it is possible to distinguish between various groups. There are two situations to be considered in the linear time series models. Firstly when the main discriminatory informati...

Harmonics have become an important issue in modern power systems. The widespread penetration of non-linear loads to emerging power systems has turned power quality analysis into an important operation issue under both steady state and transient conditions. This paper employs an Extended Harmonic Domain (EHD) based framework for dynamic analysis of long term analysis over voltages during the tra...

Hassan Abravesh

For evaluating quality of electrical insulation, it is necessary to measure the property of insulators. Dielectric constant and loss tangent (tans) are two important parameters for determining the property of insulator. The measurement of above parameters is normally based on the time- domain and frequency-domain, which is costly and time consuming. In this study a multiple-frequency binary se...

2003
Victor Sucic Boualem Boashash

The difficulty of selecting the optimal time-frequency distribution (TFD) for a given real-life signal has been one of the major limiting factors to a wider use of time-frequency analysis tools in practice. This paper, by extending our earlier works on the objective assessment of the performance of TFDs, presents a novel automatic approach for selecting a real-life signal best-performing time-f...

A. Sheikholeslami, M. A. Taghikhani, Z. Taghikhani,

This paper presents a new method for evaluation and simulation of inrush current in various transformers using operational matrices and Hartley transform. Unlike most of the previous works, time and frequency domain calculations are conducted simultaneously. Mathematical equations are first represented to compute the inrush current based on reiteration and then Hartley transform is used to stud...

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